研究のタイプ: 医学/生物学の研究 (experimental study)

[プロフラビンとマイクロ波放射:突然変異原性相互作用の欠如] med./bio.

Proflavin and microwave radiation: absence of a mutagenic interaction

掲載誌: Bioelectromagnetics 1990; 11 (2): 149-157

この研究は、パルス化2.45GHz電磁放射(RFR)とプロフラビン(DNAインターカレート剤:DNAの分子の間に入りこむ薬剤)との間に相互作用があるか否かを調べた。実験のエンドポイントは、マウス白血病細胞L5178Yのチミジンキナーゼ座での正突然変異とした。得られた変異細胞コロニーのサイズ分布に対する影響も調べた。ばく露は、正味順電力500または600Wで、4時間与えられ、SARは約40W / kgとなった。培養液の温度は、4時間ばく露の間に最大3℃上昇した:適切な37℃での温度制御を行った。その結果、プロフラビン単独ばく露群と比較して、RFRとプロフラビンの同時ばく露群に誘導された突然変異体の出現頻度に有意な増加はなかった;生じた突然変異体コロニーコロニーサイズ分布にも変化はなかった、と報告している。

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研究目的(著者による)

To investigate whether simultaneous exposure of mouse leukemic cells to radiofrequency radiation at moderate power levels can affect the extent of mutagenesis caused by proflavine (a drug known to intercalate with DNA).

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 2.45 GHz
Modulation type: pulsed
ばく露時間: continuous for 4 h
  • 電力密度: 870 W/m² unspecified (in Experiment 1 and 2.)
  • 電力密度: 650 W/m² unspecified (in Experiment 3.)
  • SAR: 40 mW/g mean (unspecified) (in Experiment 3.)
  • SAR: 40.8 mW/g mean (unspecified) (in experiment 1 and 2, standard deviation of +/- 13.4 W/kg.)

General information

Six exposure conditions: 37°C control, radio frequency exposure, temperature control exposure, proflavin treatment at 37°C, proflavin treatment with simultaneous radio frequency exposure and proflavin treatment with simultaneous temperature control.

ばく露1

主たる特性
周波数 2.45 GHz
タイプ
  • electromagnetic field
波形
  • sinusoidal
ばく露時間 continuous for 4 h
Modulation
Modulation type pulsed
Pulse width 10 µs
Duty cycle 0.25 %
Packets per second 25,000
Repetition frequency 1 Hz
ばく露装置
ばく露の発生源/構造
Distance between exposed object and exposure source 1.6 m
チャンバの詳細 anechoic chamber / 12 m x 6 m x 3 m
ばく露装置の詳細 One bath was placed directly beneath the horn
Additional information T-25 flasks were placed on the underside of the circular Styrofoam wheel, which was placed into a water bath. Two other water baths (at 37°C and for TC) were located at the far end of the anechoic chamber.
パラメータ
測定量 種別 Method Mass 備考
電力密度 870 W/m² unspecified 測定値 - in Experiment 1 and 2.
電力密度 650 W/m² unspecified 測定値 - in Experiment 3.
SAR 40 mW/g mean 計算値 unspecified in Experiment 3.
SAR 40.8 mW/g mean 計算値 unspecified in experiment 1 and 2, standard deviation of +/- 13.4 W/kg.

ばく露を受けた生物:

方法 影響評価項目/測定パラメータ/方法

研究対象とした生物試料:
調査の時期:
  • ばく露後

研究の主なアウトカム(著者による)

In no case any indication of a statistically significant increase in the induced mutant frequency due to simultaneous exposure to radiofrequency radiation (RFR) and proflavine was found, as compared with the proflavine exposures alone. There was also no indication of any change in the colony-size distribution of the resulting mutant colonies, neigther. And there was no evidence in these experiments of any mutagenic action by the RFR alone.

研究の種別:

研究助成

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